Doc's Auto Parts Engine Air Filter DA5301Docs Auto Parts Engine Air Filters: Doc's Auto Parts Premium Engine Air Filters are built for reliable performance and everyday durability. They help block dirt, dust, and debris that can cause premature engine wear, keeping clean air flowing to your engine. A high quality silicone gasket creates a secure seal, even in harsh or dusty driving conditions, while deep pleated filter media captures more contaminants to support smoother operation, improved

Doc's Diesel Filter Combo Kits:

2009 185 / 251

this high-performance cleaner delivers serious solvent strength for tough shop jobs

D4872+D15W40SEMI

Doc's Diesel Transmission Service Kits:

streak-free visibility in all conditions

6L Duramax Oil Filter 2020-2025 (Doc's NEW Black Oil Filter featuring upgraded materials and an enhanced grip

1% Efficiency Rating - Efficiency SAE J1985 3rd-Party Test Results

LX4 lubricity additive

ASTM 3rd Party Test Results:

WV – West Virginia

this advanced formula helps protect critical components